Dial in the right amount of spray your plants need with the Adjustable Flow Micro Sprinkler. Convenient knob on the side of the emitter lets you increase or decrease the volume of water emitted with a twist. Water is released in a fan spray, half-circle pattern at up to 23.9 GPH with an adjustable radius of up to 3.7 ft. (at 15-50 PSI). Ideal for groundcover, flower beds, planting beds, vegetable gardens, and new plantings. The 10-32 threaded inlet screws onto a rigid riser no tools necessary to install. The Micro Sprinkler, also known as a Micro Sprayer, is made of polyethylene treated with UV inhibitors.